<template>
	<div>
		<!--面包屑导航区域-->
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>用户管理</el-breadcrumb-item>
			<el-breadcrumb-item>角色列表</el-breadcrumb-item>
		</el-breadcrumb>
		<!--卡片视图区域-->
		<el-card>
			<el-row>
				<el-col>
					<el-button type="primary" @click="showAddRoleDialog">添加角色</el-button>
				</el-col>
			</el-row>
			<!--角色列表区域-->
			<el-table :data="rolesList" border stripe>
				<!--展开列-->
				<el-table-column type="expand">
					<template slot-scope="scope">
						<el-row :class="['bdbottom',l1 === 0?'bdtop':'','vcenter']" :key="item1.id" v-for="(item1,l1) in scope.row.children">
							<!--渲染一级权限-->
							<el-col :span="5">
								<el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
								<i class="el-icon-caret-right"></i>
							</el-col>
							<!--渲染二三级权限-->
							<el-col :span="19">
								<el-row :class="[l2 === 0?'':'bdtop','vcenter']" v-for="(item2,l2) in item1.children" :key="item2.id">
									<el-col :span="6">
										<el-tag closable @close="removeRightById(scope.row,item2.id)" type="success">{{item2.authName}}</el-tag>
										<i class="el-icon-caret-right"></i>
									</el-col>
									<el-col :span="18">
										<el-tag closable @close="removeRightById(scope.row,item3.id)" v-for="(item3,l3) in item2.children" :key="item3.id" type="warning">
											{{item3.authName}}
										</el-tag>
									</el-col>
								</el-row>
							</el-col>
						</el-row>
					</template>
				</el-table-column>
				<!--索引列-->
				<el-table-column type="index" label="序号"></el-table-column>
				<el-table-column label="角色名称" prop="roleName"></el-table-column>
				<el-table-column label="角色描述" prop="roleDesc"></el-table-column>
				<el-table-column label="操作" width="300">
					<template slot-scope="scope">
						<el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditRoleDialog(scope.row)">编辑</el-button>
						<el-button size="mini" type="danger" icon="el-icon-delete" @click="deleteRole(scope.row)">删除</el-button>
						<el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
					</template>
				</el-table-column>
			</el-table>
		</el-card>
		<!--新增角色对话框-->
		<el-dialog title="新增角色" :visible.sync="addRoleDialogVisible" width="50%" @close="addDialogClosed">
			<el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
				<el-form-item label="角色名" prop="roleName">
					<el-input v-model="addForm.roleName"></el-input>
				</el-form-item>
				<el-form-item label="角色描述" prop="roleDesc">
					<el-input v-model="addForm.roleDesc"></el-input>
				</el-form-item>
			</el-form>
			<span slot="footer" class="dialog-footer">
		    <el-button @click="addRoleDialogVisible = false">取 消</el-button>
		    <el-button type="primary" @click="addRoles">确 定</el-button>
		  </span>
		</el-dialog>
		<!--编辑角色对话框-->
		<el-dialog title="编辑角色" :visible.sync="editRoleDialogVisible" width="50%" @close="editDialogClosed">
			<el-form :model="editForm" :rules="addFormRules" ref="editFormRef" label-width="70px">
				<el-form-item label="角色名" prop="roleName">
					<el-input v-model="editForm.roleName"></el-input>
				</el-form-item>
				<el-form-item label="角色描述" prop="roleDesc">
					<el-input v-model="editForm.roleDesc"></el-input>
				</el-form-item>
			</el-form>
			<span slot="footer" class="dialog-footer">
		    <el-button @click="editRoleDialogVisible = false">取 消</el-button>
		    <el-button type="primary" @click="editRoles">确 定</el-button>
		  </span>
		</el-dialog>
		<!--分配权限的对话框-->
		<el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
			<!--树形控件-->
			<el-tree :data="rightsList" :props="treeProps" ref="treeRef" show-checkbox :default-checked-keys="defKeys" node-key="id" :default-expand-all="true"></el-tree>
			<span slot="footer" class="dialog-footer">
		    <el-button @click="setRightDialogVisible = false">取 消</el-button>
		    <el-button type="primary" @click="allotRights">确 定</el-button>
		  </span>
		</el-dialog>
	</div>
</template>

<script>
	export default {
		data() {
			return {
				rolesList: [],
				//				新增角色对话框状态
				addRoleDialogVisible: false,
				addForm: {
					roleName: "",
					roleDesc: ""
				},
				addFormRules: {
					roleName: [{
							required: true,
							message: '请输入用户名',
							trigger: 'blur'
						},
						{
							min: 3,
							max: 10,
							message: '长度在 3 到 10 个字符',
							trigger: 'blur'
						}
					]
				},
				editForm: {					
					roleName: "",
					roleDesc: ""
				},			
				editRoleDialogVisible: false,
				setRightDialogVisible: false,
				rightsList: [],
				//				树形控件的属性绑定对象
				treeProps: {
					label: "authName",
					children: "children"
				},
				//默认选中的节点id值
				defKeys: [],
				//存储编辑和分配角色的角色ID
				roleId: ""
			}
		},
		created() {
			this.getRolesList()
		},
		methods: {
			async getRolesList() {
				const {
					data: res
				} = await this.$http.get("roles");
				if(res.meta.status !== 200) {
					return this.$message.error("获取角色列表失败！")
				}
				this.rolesList = res.data;
			},
			showAddRoleDialog() {
				this.addRoleDialogVisible = true;
			},
			//			监听对话框关闭的事件
			addDialogClosed() {
				this.$refs.addFormRef.resetFields();
			},
			//新增角色
			async addRoles() {
				const {
					data: res
				} = await this.$http.post("roles", this.addForm);
				if(res.meta.status !== 201) {
					return this.$message.error("新增角色失败！");
				}
				this.getRolesList();
				this.addRoleDialogVisible = false;
			},
			showEditRoleDialog(row) {
				this.roleId = row.id;
				this.editForm.roleName = row.roleName;
				this.editForm.roleDesc = row.roleDesc;
				this.editRoleDialogVisible = true;
			},
			//
			editDialogClosed() {
				this.$refs.editFormRef.resetFields();
			},
			//编辑角色
			async editRoles() {
				const {
					data: res
				} = await this.$http.put("roles/"+this.roleId, this.editForm);
				if(res.meta.status !== 200) {
					return this.$message.error("编辑角色失败！");
				}
				this.getRolesList();
				this.editRoleDialogVisible = false;
			},
			//删除角色
			async deleteRole(row){
				//弹框询问用户是否删除数据
				const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
					confirmButtonText: '确定',
					cancelButtonText: '取消',
					type: 'warning'
				}).catch(err => err)
				if(confirmResult !== "confirm") {
					return this.$message.info("已取消删除！")
				}
				const {
					data: res
				} = await this.$http.delete("roles/" + row.id);
				if(res.meta.status !== 200) {
					return this.$message.error("删除用户失败！");
				}
				this.$message.success("删除用户成功！");
				this.getRolesList();
			},
			async removeRightById(role, rightId) {
				//弹框询问用户是否删除数据
				const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
					confirmButtonText: '确定',
					cancelButtonText: '取消',
					type: 'warning'
				}).catch(err => err)
				if(confirmResult !== "confirm") {
					return this.$message.info("已取消删除！")
				}
				const {
					data: res
				} = await this.$http.delete("roles/" + role.id + "/rights/" + rightId);
				if(res.meta.status !== 200) {
					return this.$message.error("删除权限失败！");
				}
				role.children = res.data;
			},
			async showSetRightDialog(role) {
				this.roleId = role.id;
				//				获取所有权限数据
				const {
					data: res
				} = await this.$http.get("rights/tree");
				if(res.meta.status !== 200) {
					return this.$message.error("获取权限失败！");
				}
				//				把获取到的权限数据保存到data中
				this.rightsList = res.data;
				//递归获取三级节点的id
				this.getLeafKeys(role, this.defKeys);
				this.setRightDialogVisible = true;
			},
			//			通过递归的形式,获取角色下所有三级权限的id,并保存到defKeys数组中
			getLeafKeys(node, arr) {
				//				如果当前node节点不包含children属性,则是三级节点
				if(!node.children) {
					return arr.push(node.id);
				}
				node.children.forEach(item => {
					this.getLeafKeys(item, arr)
				})
			},
			setRightDialogClosed() {
				this.defKeys = [];
			},
			//			点击为角色分配权限
			async allotRights() {
				const keys = [
					...this.$refs.treeRef.getCheckedKeys(),
					...this.$refs.treeRef.getHalfCheckedKeys()
				]
				const idstr = keys.join(",");
				const {
					data: res
				} = await this.$http.post("roles/" + this.roleId + "/rights", {
					rids: idstr
				});
				if(res.meta.status !== 200) {
					return this.$message.error("分配权限失败！");
				}
				this.$message.success("分配权限成功！");
				this.getRolesList();
				this.setRightDialogVisible = false;
			}
		}
	}
</script>

<style lang="less" scoped>
	.el-tag {
		margin: 7px;
	}
	
	.bdtop {
		border-top: 1px solid #eee;
	}
	
	.bdbottom {
		border-bottom: 1px solid #eee;
	}
	
	.vcenter {
		display: flex;
		align-items: center;
	}
</style>